Have searched with no answers.

Recenty my X5 with air suspension has started making an oscillating noise from rear passenger side suspension. I got my wife to drive slowly while i looked around and it almost sounded lile a flat tire but tire is fine. Definately not brakes and sounds kind of rubbery. Could this be a defective airbag? has anyone experienced this?

Can't call my dealer now until monday and use the X5 to transport my 8 week twins. Kinda worried. Please help

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2008 X5 4.8i BSM/Blk - premium, sports with 20" 214s, navigation, rear climate, adaptive ride, dark bamboo, running boards, 3rd row seats, USB audio, high speed maximum, etc etc

Mods: Smoked reflectors | Hoen xenon match fogs and angel eyes | LED plate bulbs | 18" winter wheels

Other vehicles: 2002 M3 Vert TiAG/Blk - with every option and many mods | 2009 Chevy Silverado LTZ - fully loaded